Class Ifc4x1::IfcLightSourceGoniometric

Nested Relationships

This class is a nested type of Struct Ifc4x1.

Inheritance Relationships

Base Type

Class Documentation

class Ifc4x1::IfcLightSourceGoniometric : public Ifc4x1::IfcLightSource

IfcLightSourceGoniometric defines a light source for which exact lighting data is available. It specifies the type of a light emitter, defines the position and orientation of a light distribution curve and the data concerning lamp and photometric information.

Figure 303 shows an example of a light emitter having two light sources (of type IfcLightSourceGoniometric).

Figure 303 — Light source goniometric

HISTORY: New entity in IFC2x2.

Public Functions

::Ifc4x1::IfcAxis2Placement3D *Position() const

The position of the light source. It is used to orientate the light distribution curves.

void setPosition(::Ifc4x1::IfcAxis2Placement3D *v)
bool hasColourAppearance() const

Whether the optional attribute ColourAppearance is defined for this IfcLightSourceGoniometric.

::Ifc4x1::IfcColourRgb *ColourAppearance() const

Artificial light sources are classified in terms of their color appearance. To the human eye they all appear to be white; the difference can only be detected by direct comparison. Visual performance is not directly affected by differences in color appearance.

void setColourAppearance(::Ifc4x1::IfcColourRgb *v)
double ColourTemperature() const

The color temperature of any source of radiation is defined as the temperature (in Kelvin) of a black-body or Planckian radiator whose radiation has the same chromaticity as the source of radiation. Often the values are only approximate color temperatures as the black-body radiator cannot emit radiation of every chromaticity value. The color temperatures of the commonest artificial light sources range from less than 3000K (warm white) to 4000K (intermediate) and over 5000K (daylight).

void setColourTemperature(double v)
double LuminousFlux() const

Luminous flux is a photometric measure of radiant flux, i.e. the volume of light emitted from a light source. Luminous flux is measured either for the interior as a whole or for a part of the interior (partial luminous flux for a solid angle). All other photometric parameters are derivatives of luminous flux. Luminous flux is measured in lumens (lm). The luminous flux is given as a nominal value for each lamp.

void setLuminousFlux(double v)
::Ifc4x1::IfcLightEmissionSourceEnum::Value LightEmissionSource() const

Identifies the types of light emitter from which the type required may be set.

void setLightEmissionSource(::Ifc4x1::IfcLightEmissionSourceEnum::Value v)
::Ifc4x1::IfcLightDistributionDataSourceSelect *LightDistributionDataSource() const

The data source from which light distribution data is obtained.

void setLightDistributionDataSource(::Ifc4x1::IfcLightDistributionDataSourceSelect *v)
const IfcParse::entity &declaration() const
IfcLightSourceGoniometric(IfcEntityInstanceData *e)
IfcLightSourceGoniometric(boost::optional<std::string> v1_Name, ::Ifc4x1::IfcColourRgb *v2_LightColour, boost::optional<double> v3_AmbientIntensity, boost::optional<double> v4_Intensity, ::Ifc4x1::IfcAxis2Placement3D *v5_Position, ::Ifc4x1::IfcColourRgb *v6_ColourAppearance, double v7_ColourTemperature, double v8_LuminousFlux, ::Ifc4x1::IfcLightEmissionSourceEnum::Value v9_LightEmissionSource, ::Ifc4x1::IfcLightDistributionDataSourceSelect *v10_LightDistributionDataSource)

Public Static Functions

const IfcParse::entity &Class()